The measure of an angle is 18°. What is the measure of its supplementary angle?

The measure of a supplementary angle is found by subtracting the given angle from \(180^\circ\). 

Given:
- The angle is \(18^\circ\).

To find the supplementary angle:
\[
180^\circ - 18^\circ = 162^\circ
\]

So, the measure of the supplementary angle is \(162^\circ\).

Would you like more details or have any questions?

Here are 5 related questions:
1. What is the measure of the supplementary angle of \(45^\circ\)?
2. How do you find the complementary angle of a given angle?
3. What is the measure of the supplementary angle if the given angle is \(120^\circ\)?
4. Can two acute angles be supplementary?
5. What is the sum of the angles in a triangle?

**Tip:** Supplementary angles always add up to \(180^\circ\).

Find out how to calculate the supplementary angle when given an angle of 18°. This problem explores key geometric concepts, including angles and the formula for supplementary angles. Ideal for students in Grades 6-8.

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